Portable security device



FIG. 1 is a side perspective view of a portable security device, illustrated to stand on its bottom side and a back panel that is opened;

FIG. 2 is a front view thereof, illustrated as laid flat on its back side;

FIG. 3 is a back perspective view thereof, illustrated as laid flat on its front side with the back panel opened; and,

FIG. 4 is a back view thereof, illustrated as laid flat on its front side with the back panel closed. 

CLAIM The ornamental design for a portable security device, as shown and described. 